Question about Niagara Baker won't bake alpha channel

Hello guys, I’m new to Niagara and I’m trying to bake some smoke for my particle to use but every time I try to bake a simulation it bakes without alpha channel and look something like this

without alpha channel

With alpha channel

and if I put it into a flipbook material it looks like this

If I connect the alpha channel to Opacity mask it just go blank…

Any help is appreciated!
Thank you very much!

I have this question too,I had adjustment emissions channel in other software,but i can no t render the same buffer in unreal.Have you solved the problem?

searching for result and found this is my post. No, I eventurally give up and used other software.

Probalby is because you have the material in the incorrect blending mode. Check the material and if you can put in translucent, unlit mode, whit this works fine. You are welcome